<template>
  <view>
    <view class="goods-list">
      <view v-for="(goods, i) in goodsList" :key="i" @click="gotoDetail(goods)">
        <my-goods :goods="goods"></my-goods>
      </view>
    </view>
  </view>
</template>

<script>
  export default {
    data() {
      return {
        queryObj: {
          query: '',
          cid: '',
          pagenum: 1,
          pagesize: 10
        },
        goodsList: [],
        total: 0,
        isloading: false
      };
    },
    onLoad(options) {
      this.queryObj.query = options.query || ''
      this.queryObj.cid = options.cid || ''
      this.getGoodsList()
    },
    methods: {
      async getGoodsList(cb) {
        this.isloading = true
       
          const { data: res } = await uni.$http.get(
            'https://api-hmugo-web.itheima.net/api/public/v1/goods/search', 
            this.queryObj
          )
           this.isloading = false
           
           //只要数据请求完毕，就立即按需调用 cb回调函数
           cb && cb()
          if(res.meta.status !== 200) return uni.$showMsg()
          this.goodsList = [...this.goodsList, ...res.message.goods]
          this.total = res.message.total
      },
      gotoDetail(goods) {
        uni.navigateTo({
          url: '/subpkg/goods_detail/goods_detail?goods_id=' + goods.goods_id
        })
      },
    },
      
    onReachBottom() {
      //判断是否还有下一页数据
      if(this.queryObj.pagenum * this.queryObj.pagesize >= this.total)
        return uni.$showMsg('数据加载完毕！')
      
      if(this.isloading) return
      
      this.queryObj.pagenum += 1
      this.getGoodsList()
    },
    onPullDownRefresh() {
      //重置关键数据
      this.queryObj.pagenum = 1
      this.total = 0
      this.isloading = false
      this.goodsList = []
      
      //重新发起请求
      this.getGoodsList(() => uni.stopPullDownRefresh())
    }
  }
</script>

<style lang="scss">
</style>
